she's now in cairo as well trying to push forward with the cease fire but really since last night, there really has not been much progress or at least public progress towards a cease-fire. in fact, today, at noon, local time, when that bus in tel aviv was hit by a bomb, that really did ratch chet up the tension -- ratchet up the tension quite a lot. in fact, right where i'm standing, after the news spread of the bombing, there was a very large explosion from an israeli air strike just nearby. >> ben, has anyone claimed responsibility for the bus attack? >> reporter: no. nobody actually has. now, initially, there were -- there was -- there are moves in gaza city that were announcing that this was the work of so- called lions from the west bank and some people assumed that because they are coming from hamas, the announcement was coming from hamas-controlled mosques, that hamas was claiming responsibility. no one has claimed responsibility. hamas did quote/unquote bless the operation saying that, according to one hamas official, that it was a natural reaction to what's going on in gaza. but